Iota Herculis — Star in Hercules
Observe
1Physical Properties
Magnitude
3.80
Range
3.80 - 3.82
Period
3.5 days
Variable Type
Slowly Pulsating B Star
Spectral Type
B3IV
subgiant
Star Color
Blue
(B-V -0.18)
Distance
455 ly
2Position & Identifiers
RA
17h 39m 27.9s
Dec
+46° 00' 23.0"
Constellation
Hercules
(Her)
HR
6588
HIP
86414
HD
160762
SAO
46872
Bayer
Iota
Flamsteed
85 Her
Variable ID
Iot Her
Querying VizieR catalog...
3How easy to spot?
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| Equipment | Bortle 3 | Bortle 4 | Bortle 5 |
|---|---|---|---|
| Naked eye Naked eye | Easy | Medium+ | Medium+ |
| 50 mm finder 50mm finder | Easy | Easy | Easy |
| 150 mm telescope 150mm scope | Easy | Easy | Easy |
Easy
Medium
Hard
Very hard
Impossible
Bortle 3 = rural · 4 = outer suburbs · 5 = suburbs
4Visibility
Set a location in User Settings to see visibility data.
Best season
May – Jul
(peak: Jun)
5Survey Image
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Explore
7
Size Comparison
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8
Compare Stars
9
Spectral Classification
10
Hertzsprung-Russell Diagram
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11
Stellar Lifecycle
12
Blackbody Spectrum
13
Stellar Absorption Spectrum
Simulated absorption spectrum based on spectral type. Hover over lines to identify elements.
14
Stellar Fusion
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15Stellar Notes
Beta C?, amp. 0.01V.
113.804d, K 5.4 k/s, V0 -20.0 k/s, asini 7.629. RV also var. 0.1434d.
Color excess E(B-V) = -0.02.
16
Light Travel Time Machine
17
Relativistic Travel
Nearby in the Sky
Other targets within a few degrees — pan your scope a little and keep exploring.
Visibility scores assume a 150 mm Newton at Bortle 4.
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Article
Hercules
Mythology, bright stars, and deep-sky highlights.
Constellation
